void main()
{
	int n,i,j,m=0;
    double distance[1000],x[100],y[100],t;//??????????double??
    scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%lf %lf",&x[i],&y[i]);//?????scanf("&f %f",&x[i],&y[i]);
    }
	for(i=0;i<n;i++)
	{
		for(j=i;j<n;j++)
		{
			distance[m]=sqrt((x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]));
			m++;
		}
	}
	for(i=0;i<m;i++)
	{
		for(j=0;j<m-i-1;j++)//j++????i++,?????
		{
			if(distance[j]<distance[j+1])
			{
				t=distance[j];
				distance[j]=distance[j+1];
				distance[j+1]=t;
			}
		}
	}
	printf("%.4f\n",distance[0]);
}
